Université de Neuchâtel

Theoretical treatment and computer simulation of microelectrode arrays

Morf, Werner E. ; Koudelka-Hep, Milena ; de Rooij, Nicolaas F.

In: Journal of Electroanalytical Chemistry, 2006, vol. 560, no. 1, p. 47-56

New relations for and interrelations between the current responses of different microelectrode arrays are presented. Interdigitated microelectrode arrays (IDAs: alternating cathodes and anodes) and uniform microband electrode arrays (MEAs: only cathodes or anodes) are treated, and miniaturized systems with planar band electrodes or hemicylinder electrodes are discussed. A common basis was found...

Université de Neuchâtel

Influence of cationic and anionic additives on the electrical properties of ionophore-based ion-selective membranes

Morf, Werner E. ; de Rooij, Nicolaas F. ; Pretsch, Ernö

In: Journal of Electroanalytical Chemistry, 2005, vol. 581, no. 2, p. 265-274

The steady-state electrical behavior of cation-selective ionophore membranes with different kinds of ionic additives was studied on a theoretical basis. Membranes with both mobile and fixed anionic sites exhibit nonlinear current–voltage curves, which is in contrast with the ohmic behavior of pure fixed-site membranes. This can be explained from the specific concentration profiles in the...